Nitrogen-containing heterocyclic derivative, organic electroluminescence element material using same, and organic electroluminescence element and electronic device using same
US-9837615-B2 · Dec 5, 2017 · US
Ring systems containing three or more rings
Ring systems containing three or more rings · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C07D209/56 |
| Official title | Ring systems containing three or more rings |
| Display label | Ring systems containing three or more rings |
| Total patents | 275 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 28 |
| 2016 | 25 |
| 2017 | 26 |
| 2018 | 39 |
| 2019 | 29 |
| 2020 | 28 |
| 2021 | 25 |
| 2022 | 25 |
| 2023 | 18 |
| 2024 | 13 |
| 2025 | 15 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Organic electronic device and display apparatus using composition for organic electronic device
US-2017317290-A1 · Nov 2, 2017 · US
Nitrogen-containing polycyclic compound and organic light emitting device using same (as amended)
US-2017283379-A1 · Oct 5, 2017 · US
Condensed cyclic compound and organic light-emitting device comprising the same
US-9660197-B2 · May 23, 2017 · US
Organic compound and organic light emitting diode device including the same
US-9647216-B2 · May 9, 2017 · US
Electroactive materials
US-2017110664-A1 · Apr 20, 2017 · US
Chrysene-based compound and organic light-emitting device including the same
US-9601699-B2 · Mar 21, 2017 · US
Synthesis of tetracyclines and analogues thereof
US-2016340325-A1 · Nov 24, 2016 · US
Tetracyclic compound
US-2016340308-A1 · Nov 24, 2016 · US
Condensed fluoranthene compound, material for organic electroluminescent element using this compound, organic electroluminescent element using this material, and electronic device
US-2016322587-A1 · Nov 3, 2016 · US
Composition comprising tetracyclic compound
US-2016317494-A1 · Nov 3, 2016 · US
Seriniquinones, melanoma-specific anticancer agents
US-9481662-B2 · Nov 1, 2016 · US
OCTAHYDRO-CYCLOBUTA [1,2-c;3,4-c']DIPYRROL-2-YL
US-2016264586-A1 · Sep 15, 2016 · US
Tetracyclic compound
US-9440922-B2 · Sep 13, 2016 · US
Condensed fluoranthene compound, material for organic electroluminescent element using this compound, organic electroluminescent element using this material, and electronic device
US-9419226-B2 · Aug 16, 2016 · US
Compound and organic light-emitting diode including the same
US-9406890-B2 · Aug 2, 2016 · US
Heterocyclic compound and organic light-emitting diode including the same
US-9391282-B2 · Jul 12, 2016 · US
Heterocyclic compound and organic light-emitting device including the same
US-9391280-B2 · Jul 12, 2016 · US
Heterocyclic compound and organic light emitting device including the same
US-9385325-B2 · Jul 5, 2016 · US
Organic light-emitting device
US-2016190473-A1 · Jun 30, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07D209/56?
- CPC C07D209/56 is the Cooperative Patent Classification code for “Ring systems containing three or more rings.”
- How many patents are filed under CPC C07D209/56 (Ring systems containing three or more rings)?
- Our database includes 275 publications tagged with this CPC code.
- Is patent activity under CPC C07D209/56 growing?
- Publication counts under this code: 13 in 2024 vs 15 in 2025 (latest complete years).